Discrete phase or two phase model in Fluent?

andrea panizza

Good morning, I am a Ph.D.student working in the field of CFD, who used to code his own programs for CFD analysis, until now. I should model the flow of an ideal gas around and into an instrument for the measurement of dust properties (that is, a fairly complex 3D geometry), and the transportation of dust by the flow, as well as its interaction with the instrument. Ambient pressure is around 6 mbar and temperature is around -40 °K; the dust content is 1.8e-7 kg/m^3 (mass of dust per unit volume of gas). The dust radius is exceedingly small, e.g. of the order of microns: the characteristic length of the instrument may be taken to be 4-10 cm. I would like to use Fluent to simulate this problem: how can I choose between a two phase model and the discrete phase model? Any suggestions? Thanks,

Andrea Panizza